The reason why Guangdong people call grass carp pomfret: Pomfret appeared as early as the Han Dynasty and has always been the official title of grass carp in ancient times. Guangdong people called grass carp pomfret in ancient times.

Grass carp (scientific name: Ctenopharyngodon idella) is a fish of CYPRINIDAE and Ctenopharyngodon. The common names of grass carp are: pomfret, pomfret, grass pomfret, pomfret, white pomfret, grass roots (northeast) and so on. Body length is 3.4 ~ 4.0 times of body height, 3.6 ~ 4.3 times of head length, 7.3 ~ 9.5 times of tail stalk length and 6.8 ~ 8.8 times of tail stalk height. Long body, slightly blunt kiss, 2 rows of hypopharyngeal teeth, comb-shaped.

Grass carp (Ctenopharyngodon idellus) is a typical herbivorous fish, which lives in rivers and lakes in plain areas, and generally prefers to live in the middle and lower layers of water bodies and coastal areas with more aquatic plants. Sexually active, swimming fast, often foraging in groups. Grass carp eat larvae, algae, etc. In the juvenile stage, grass carp also eat some carnivorous foods, such as earthworms and dragonflies.

Grass carp is naturally distributed in China, Russian and Bulgarian, and mainly distributed in the Yangtze River, Pearl River and Heilongjiang River systems in China. Grass carp in Heilongjiang River system entered the Heilongjiang River system from the river plain where Nenjiang River was connected with Liaohe River and Bohai Sea before Pliocene, and reached Xingkai Lake in the lower reaches slightly higher than Aihui and Qiqihar.

Grass carp in the Pearl River system may have spread from the lower reaches of the Yangtze River and Qiantang River to the Pearl River system and reached Quanzhou, Du 'an and Baise during the Ice Age when the sea level was 100 meters lower than it is now and when the Taiwan Province Strait was a low plain.